CREATINE, SERUM or PLASMA

Specimen Required
Draw blood in a SST. Centrifuge, remove serum from cells within 2 hours of collection, and send 1.0 mL serum (0.2 mL minimum) frozen in a screw-capped plastic vial.

Alternate Specimen
Serum: Red-top; Plasma: Green (Sodium or lithium heparin); Lavender EDTA

Methodology
Liquid Chromatography/Tandem Mass Spectrometry

Stability
Room temperature: Unacceptable; Refrigerated: 7 days; Frozen: 14 days

Reference Range
By report

Performed
Monday

Turnaround Time3-10 days
Test CodeCREAS
CPT-4 Code (s)
82540
LOINC Codes
Creatine, Serum/Plasma: 15045-8;
Creatine, Serum/Plasma-mg/dL: 2148-5

Warde
Medical
Laboratory